Rise-and-fall jacquard mechanism



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UNITED STATES PATENT OFFICE.

WILLIAM EVANS, OF BIRMINGHAM, CONNECTICUT.

RISE-AND-FALL JACQUARD MECHANISM.

SPECIFICATION forming part of Letters Patent No. 498,912, dated J' une6, 1893.

Application tiled February 27, 1893. Serial No. 463,948. (No model.)

T0 @ZZ whom it may concern:

Be it known that 1, WILLIAM EVANS, a citizen of the United States,residing at Birmingham, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inRise-and-Fall J acquard Mechanisms, of which the following is aspecification, reference beinghad therein to the accompanying drawing.

My invention relates to what are known in the art as rise and fallJacquard mechanisms. In a Jacquard mechanism of this class, the verticalhooked wires are moved up and down in the opening and closing of thesheds, by what are known usually as a griff and a hook plate, which aremoved simultaneously in opposite directions,the griff rising and thehookplate descending in the opening of a shed, and the griff descendingand the hook-plate plate ascending in the closing of a shed. It has beenproposed heretofore to so operate the griff and hook-plate as that thehook-plate shall be caused to dwell or momentarily restat or about thetime of the complete closing of the shed, this dwell or rest in themovement of the hook-plate having been secured by devices which areshown and described in United States LettersPatent to GeorgeW. Staffordand C. H. Poland, No. 420,119, granted Jan uary 28, 1890.Thereasonsforthusoperating the hookplate are fully set forth in thespecication of the said patent, to which reference may be made, and neednot be repeated herein. It has been proposed heretofore, also, tooperate the griff and hook-plate so as to occasion either a dwell ofboth, or a dwell of the hook-plate alone after the shed has been fullyopened, the object in the first case being to give the shuttle fairopportunity to pass completely through the shed while the oppositeplanes thereof remain separated sufficiently to give it unobstructedpassage, and in the second `case the object being to provide against theshuttle becoming lifted from contact with the shuttle-race, or divertedfrom its proper line of movement, in consequence of the rising of thebottom plane of the shed before the shuttle has completed its flightfrom one side of the loom to the other.

My invention has forits main object to provide in a simple and practicalmanner for seas hereinafter is made clearly to appear, and A it rst willbe fully described with ref'erence to the accompanying drawing, and thenwill be particularlypointed out and precisely delined in the claimsappended to this specilication and making a part hereof.

The accompanying drawing shows in side elevation a portion of a rise andfall Jacquard mechanism of usual construction, with my invention appliedthereto, enough of the said mechanism being represented to renderclearly apparent the nature and relations of my invention. v

At 1 is shown the trame-work of the Jacquard mechanism, at 2 asupporting beam, at 3 the usual operating lever, the same being actuatedin known and suitable manner from one of the rotating shafts ofthe loomto which the Jacquard mechanism is applied.l

At 4l is shown the pivotal support for lever 3, the said support beingsecured to the beam 2.

At 5 is shown the griff, and at 6 is shown the hook-plate.

All of the foregoing, and such of the details necessary to a completeand operative Jac` quard mechanism as are not shown in the accompanyingdrawings, are or may be of any known or suitable construction.

At 7 is a rocker which is pivoted at 8 to the end-piece 9 forming partof theframe-Work 1.

At 10 is a link or connection which at one end thereof is connectedpivotally with one arm 11 of the rocker 7 and at the other end thereofis connected pivotally'with the griff 5, and at 12 is a second link orconnection which at one end is connected pivotally with the other arm 13of the rocker 7 and at the other end thereof is connected pivotally withthe hook-plate 6. The arm 11 also has connected therewith pivotally oneend of a link or connection 14, the other end of which is connectedpivotally with one arm 15 of a IOC 15 of the second rocker 16 enablesthelink orv connection 14 to be pivotally connected with the said arm atany desired radial distance from the axis on which the said rockerturns, and thus provides for varying the throw transmitted through thelink or connection 14, and thereby varying the size of the opening ofthe shed.

The points at which the links or connecl tions 11 and 12 are connectedwith the rocker 7 are at any desired andsuitable angular disi tanceapart, this distance depending in part upon whether both the griff andhook-plate or only one of them shall be caused to dwell as the saidrocker is moved. l have shown the said distance as being less than onehundred and eighty degrees, inasmuch as in themechanism illustrated Icontemplate producing by the action of the said rocker a dwell of onlyone .of the parts actuated therefrom.

the rocker 7 will ordinarily be proportioned and arranged in such4manner that as the said rocker is caused to near the end of its strokein one direction, and thereby reaches the position which it .occupies atthe time of one extreme in theshed-formation, one of the points l ofpivotal connection of the links or `connec- I,

tions 11, 12, therewith will reach or pass slightly beyond a deadcenter, this occasioning a dwell in the movement of the corre-'Preferably, the arrangement, dac., are such as to cause the hookplatethus to dwell at the time ofthe closing of the shed, in order to securethe mode of. operation and results which are set forth in L spendingactuated part.

Letters Patent No. 420,119, hereinbefore mentioned. With the object inview of securing a dwell of both the griff and. the hook-plate at theother .extreme of the shed-formation, which, in this instance, is whenthe shed is open, the second rocker 16 ordinarily is connected andarranged by me in the manner shown in the drawing to cause the pivotalconnection between the same and the link or connection 14 to reach vorpass slightly' a dead center at the time when the shed has been openedfully.

Each of the links or connections 1-0, 12, 14 and 18 is made variable inlength. A suitable construction thereof is shown in the drawing, inwhich each of the said links or connections is made in two parts. Theseparts are slotted where they koverlap eachother, as

, at 101, and through the slots pass bolts 102 for holding themadjustably together. By making the said links or connections variable inlength I am enabled to eect readily desired or necessary adjustmentsthereof, and

The parts intermediate the operating lever 3 and t to vary the action ofthe griff and hook-plate in important respects. For example, bylengthening the links or connections 1 4 and 18, the position of therocker 16 may be so changed as not to allow the point of pivotalconnection between it and the link or connection 1-1E to pass the topcenter, and thus less than the full attainable amount of dwell at thetime of the open shed may be obtained. In proportion as thelengtheningis continued the amount of dwell will be reduced. lf thislengthening be continued to a sufficient eX- tent, the dwell may beprevented altogether from occurring. link or connection 14, and theshortening of the links or connections 10 and 12, the position of therocker? maybe changed similarly so as to reduce the amount of the dwellof the hook-plate when the shed is closed, and if .this lengthening iscontinuedtoa sufficient extent the dwell will disappear. Should it bedesired at anytime to raise orlower -theJ acquard harness, whichheretofore has been accomplished, usually, by raising and lowering theentire Jacquard mechanism, it is necessary only to adjust or `vary inobvious manner the lengths ofthe links `or connections lOand l2. Byeecting adj ustmen-t of the linkor connection 1-2, the height of thelower plane of the open shed may be regulated, and therehythe said lowerplane may be made to hear properly upon the shuttle race of the loom.

The rocker 16 will usually be mounted on one end of a rock-shaft 169,the latter being ,extended through -to the other end of the Jacquardmechanism, where the connections intermediate the said shaft and thegriff and hook-plate will he duplicated, as will be understood.

What l claim is- 1. The combination .with the griff and hookplate of arise and fall Jacquard mechanism, links .or kconnections connectedtherewith, and a rocker to which said links or connections areconnected, of a link or connection connected with the rocker for movingthe same, a second rocker having the point of connection of thelast-mentioned link or connection therewith adapted to reach or passslightly a center in ltheturningof the second rocker, to occasion adwell of both the griff and hook-plate at one extreme vof theshedformation, and means for operating the second rocker, substantiallyas described.

2. The combination with the griff and hookplate of a rise and fallJacquard mechanism, links or connections connected therewith, and arocker having one of the poi-nts .of connection of the said links orconnections therewith adapted to reach or pass slightly a center in themovement of the rocker, for the purpose of occasioning a dwell of thecorrespending actuated part at one eXtreme .of the shed-formation, of athird link or-con-nection whereby to move the said rocker, a secondrocker having the point of connection of the third link or connectionthereto adapted to By the lengthening of the- IOO IOS

reach or pass slightly a center, for the purpose of occasioning a dwellof both the griff and the hook-plate at the other extreme of theshed-formation, and means for operating the second 1'ocker,substantiallyas described.

3. The combination with the griff and hookplate of a rise and fallJacquard mechanism, linksor connections of variable length connectedwith both thereof, a rocker with which said links or connections areconnected also, and means for actuating the said rocker, whereby byvarying the operative length of the links or connections the Jacquardvharness may be raised and lowered and the height of the lower plane ofthe open shed may be regulated Vsubstantially as described.

4f.V The combination with the grii and hookplate of a rise and fallJacquard mechanism, links or connections of variable length connectedwith both thereof, and a rocker having one of the points of connectionof the saidV links or connections therewith adapted to reach or passslightly a center in the movement of the rocker, for the purpose ofoccasioning a dwell of the corresponding actuated part at one eXtreme ofthe shed-formation, of a third link or connection also variable inlength whereby to move the'said rocker, and means for moving the saidthird linkorconuection,wherebyby varying the operative length of thelinks or connections the Jacquard harness may be raised and lowered, andthe height of the lower plane of the open shed may be regulated, andalso the amount of theV aforesaid dwell may be varied, substantially asdescribed.

5. The combination with the gri and hookplate of a rise and fallJacquard mechanism,

links or connections of variable length connected with both thereof, anda rocker having one of the pointsv of connection of the said links orconnections therewith -adapted to reach or pass slightly a center in themovement of the rocker, for the purpose of occasioningadwell of thecorresponding actuated part at one extreme of the shed-formation, of athird link or connection alsovariable in length whereby to move the saidrocker, a second rocker having the point of connection ofthelast-mentioned link or connection therewith adapted to reach or passslightly a center in the turning of the second rocker, to occasion adwell of both the griif and the hookplate at the other extrexneof theshed-formation, and means for moving the said second rocker,substantially as described;

6. The combination with the griff and hookplate of a rise and fallJacquard mechanism, links or connections of variable length connectedwith both thereof and a rocker having one of the points of connection ofthe said links or connections therewith adapted to reach or passslightly a center in the movementof the rocker, for the purpose ofoccasioningadwell of the corresponding actuated part at one extreme ofthe shed-formation, of a third 'link or connection also variable inlength whereby to move the said rocker, a second rocker having the pointof connection of thelast-mentioned link or connection therewith adaptedto reach or pass slightly a center in the turning ofthe second rocker,to occasion a dwell of both the griff and the hook.-l

plate at the other extreme of the shed-formation, a link or connectionof variable length connected with the second rocker for moving the same,and meansfor moving the link or connection last-mentioned, substantiallyas described. w 7. The combination with the griff and hookplate of arise and fall Jacquard mechanism, links or connections connectedtherewith, and a rocker having one of the points of connection of thesaid links or connections adapted to reach or pass slightly a center inthe movement of the rocker, for the purpose of occasioningadwell of thecorresponding actuated part, of alink or connection of variable lengthconnected with the said rocker for moving the same, a second rockerhaving the point of connection of thesaid link orconnection there- IOOIn testimony whereof I affix my signature in presence of two witnesses.

WILLIAM EVANS.Y

WVitnesses:

S. I-I. LEssEY, WM'. S. BROWNE.

